This presentation provides an overview of Wi-Fi/wireless networking. It discusses the history and invention of Wi-Fi, how Wi-Fi works, building a Wi-Fi network using access points, Wi-Fi security methods like WEP and WPA, common Wi-Fi topologies like client/server and peer-to-peer, the growing scope and availability of Wi-Fi networks, and concludes with a brief demo. The presentation was given by JKC College in Guntur to introduce attendees to the technology and applications of wireless networking using Wi-Fi standards.

1. IT’S A PRESENTATION
FROM
JKC COLLEGE
GUNTUR.

3.  Wi-Fi
Introduction
Working principle
Products
Building a WiFi Network
Wi-Fi Security
Scope of WiFi
 Bibliography
 Concluding remarks
Agenda

4. INVENTION
• Vic Hayes, has been called the “father of WiFi” because he managed the committee that
created the first 802.11 standard in 1997

5. WIRELESS FIDELITY (WI-FI)
WELCOME TO THE WORLD OF WIRELESS
A radio technology that networks the devices.
Refers to wireless LAN products based on the IEEE 802.11b
specification
Provides easy connections to the internet and business networks while
traveling
The main attractive feature of this technology is that it can
provide wireless broadband connection within a specific geographic
boundary.

6. OPERATING
MODESInfraStructure Mode
AD HOC Mode

7. BUILDING A WIFI
A Wi-Fi hotspot is created by installing an access point to
an internet connection.
An access point acts as a base station.
When Wi-Fi enabled device encounters a hotspot the device can
then connect to that network wirelessly.
A single access point can support up to 30 users and can
function within a range of 100 – 150 feet indoors and up to 300 feet
outdoors.
Many access points can be connected to each other via
Ethernet cables to create a single large network.

8. A WAY TO AMPLIFY WIFI SIGNALS
A WiFi repeater
is installed to
extend
coverage.

9. WIRELESS LOCAL AREA NETWORKING

10. THE BEAT GOES ON..
Locating Hotspots
There are many WiFi hotspots now
available in public places like
restaurants, hotels, libraries and airports.
For example, k.l university
The number of hotspots in the world is
growing daily.

11. WIFI TOPOLOGIES
• The client communicates through Access Point.
• It connects the PC’S by an AP.
• It consists of 2 or Base Stations.
• It includes 10-15% overlap to allow roaming.
AP-based topology

12. PEER-TO-PEER
TOPOLOGY
• Access Point is not required.
• Client devices within a cell can communicate
directly with each other.
• It is useful for setting up of a wireless network
quickly and easily.

13. POINT-TO-MULTIPOINT BRIDGE TOPOLOGY
• Used to connect a LAN in one building to a LANs in other
buildings even if the buildings are miles apart.
• Range varies based on the type of wireless bridge and
antenna used as well as the environmental conditions.

14. WIRELESS FIDELITY
Advantages
Mobile.
Widely available in public venues.
Relatively inexpensive.
Easy to set up a network.
User-friendly software.
Security features.
Global set of standards.

15. WEP stands for Wired Equivalency Privacy
As its name implies, this standard was intended to make
wireless networks as secure as wired networks.
The common key lengths are currently 128- and 256-bit.
WPA Wi-Fi Protected Access is an early version of the
802.11i security standard that was developed by the Wi-Fi
Alliance to replace WEP.
WI-FI SECURITY

17. 29 August 2013 17
A SPECIAL SECURITY SOFTWARE

18. Wi-Fi Cameras used in BANKS

19. In few more years all electronic devices are going to
have a built in Wi-Fi..
So once again we welcome to World of wireless.
Many colleges and businesses have suitable building
layouts that can be wireless to build a unwired network.
Wi-Fi is a very cost effective alternative in these
environments.
SCOPE OF Wi-Fi

21. “Things that think…
don’t make sense unless they link.”
Its time for small Demo…

22. THIS PAPER HAS BEEN SUBMITTED UNDER THE
GUIDANCE OF
r Engg).
MRS.N.RAJYA LAKSHMI
Department OF Computer ‘s
HOD i/c (Compu

23. BIBLIOGRAPHY
www.wikipedia.com
www.howstuffworks.com
www.palowireless.com
www.technologyreview.com
http://www.wirelessethernet.org/index.html
http://grouper.ieee.org/groups/802/index.html
http://standards.ieee.org/getieee802/
http://www.cisco.com
http://grouper.ieee.org/groups/802/11/index.html
http://grouper.ieee.org/groups/802/15/index.html
www.sss-mag.com/ss01.html#other

24. THANK YOU